If you hold Bitcoin, you should install one of the Bitcoin client software implementations, such as Bitcoin Core or Bitcoin Knots, on your computer. For example, if you have hardware wallets, especially those for scam shitcoins like Ledger or Trezor, you cannot be sure if you truly own Bitcoin when connecting to these wallet applications. These applications may show you numbers on the screen, but that doesn't mean you own real Bitcoin. Gold stopped being a medium of exchange and a unit of account in the 16th and 17th centuries precisely because counterfeit gold coins appeared, and it became difficult to verify whether the gold was real. Gold was placed in bank vaults, and banks issued IOU certificates (banknotes). Thus, banknotes became the medium of exchange and the unit of account
This marked the beginning of the fiat standard. Bitcoin is much better than gold because it is easier to transfer and store without any costs, but most importantly, verification is very simple. Anyone can verify if they own Bitcoin by running a node. Dont trust, verify
Installing a node on your computer is very simple and doesn't require many resources. The Bitcoin client doesn't need to be online 24/7; you can use it only when making transactions or occasionally activate it to sync with the network. The easiest way to use it is with the Sparrow wallet.
You are absolutely right about the need to have your own personal running of your Bitcoin node. This is your security in as far as integrity and security of investments are concerned. Running node not only verifies your transactions, but it also aids in decentralization and transparency of the complete bitcoin network, enabling users to manage assets other than relying on third-party wallets.
While wallets like Ledger and Trezor can be very popular, it still requires some level of trust from developers. Using private nodes minimizes this reliance and increases the transparency. I'm glad you also mentioned the Sparrow wallet; it is nice to use and makes the process possible for node newbies to afford.
Overall, it fosters higher enlightenment regarding Bitcoin and tends to align with independent principles within the cryptocurrency space. It would be extremely important for anyone who really intends to invest in Bitcoin to consider these steps.
Running a full Bitcoin node is a great way to help support the network. But not everyone is capable of doing this. The amount of resources needed sometimes becomes a barrier to people struggling with their financial lives. 500GB of blockchain data might not sound like much, but in developing countries (third world) it does. Most people living in such countries can't afford to buy hard drives with large capacity to store such data. Not to mention the bandwidth requirements. Their only option would be to run an SPV node (light node). And that won't be much help to the network. Especially when nodes need to store the long history of Blockchain transactions for self-preservation of the Bitcoin network.
If this is the case with Bitcoin, forks with bigger block sizes (Bitcoin Cash and Bitcoin SV) are even worse. I wouldn't recommend running a full Bitcoin node using the "Bitcoin Knots" software. Not after the developer wanted to censor Ordinals inscriptions. If you run it, you are supporting such censorship (which goes against Bitcoin's principles). Just my two sats.

Resource requirements Both in terms of system administration and bandwidth. This can be a significant constraint for many people.
While running a full node is preferable for serving the network and preserving network integrity, offering an SPV node is more attainable. This still allows users to interact with the Bitcoin network while reducing the need for several resources in running full nodes, SPV nodes do not give safety and precision compared with full nodes. However, it can also make the user participate in the network. This has spread knowledge and use of Bitcoin in resource-poor areas.
I share your concerns with Bitcoin Knots and potential censorship - it is very important that it maintains the decentralized, censorship-resistant principles of Bitcoin. Communities need to pay attention to which program options are in place and their effects. For all the wrangling over node software, it speaks much to what is required in terms of transparency and adherence to core values embodied within Bitcoin.