the strength of Bitcoin was in decentralization, no censorship, etc. But, the anonymity of Satoshi keeps Bitcoin's reputation cause if the identity of Satoshi is revealed we will see some organizations that will make die threat or bring up a criminal case against Satoshi just to ruin Bitcoin's reputation.
Meanwhile, it is hard to know if Satoshi is a group or an individual, and Satoshi's identity not knowing his identity now does mean justify Satoshi to be an individual.
Why will they do that, why will they threaten the guy when the guy is innocent and didn't do any bad deals with them. It's only in their head that they think satoshis creation bitcoin have impacted their business badly but the truth is it didn't.
You have a point but to understand some people don't like their competitor to thrive more than them and when such things happen the only thing they will be after is the downfall of the project creator cause they know they can shut down the project is the leader found guilty of the crime planned by them.
This also happens in the cryptocurrency ecosystem where some projects experience double-spending attacks which are mostly executed by competitors.
Why can't they just improve their own creations so that it will perform better and maybe people will stick more to it.
To some people, this is never an option.
If let say that satoshi revealed himself one day and he will get arrested or what, btc will still be btc and I think btc will become more stronger because people are showing that they are with satoshi. If there is something that they can help, that is by investing and holding more bitcoins.
I think on the reason why he/she got arrested but I am sure some people won't stop until they take him down and also find something to make Bitcoin more restricted.