I get what you mean. The buy-and-hold strategy is especially valid for Bitcoin and has been a proven way to make gains for years. But Bitcoin has different uses. It's not just an investment tool. I've been buying and selling things with Bitcoin for 12 years. For me, Bitcoin is money.
Some people see it like a stock, some see it like gold. But as it was originally intended, Bitcoin is a means of exchange that can stand strong against inflation. If you clearly separate the coins you keep for investment from the ones you use in daily transactions, you'll be more successful.
Your point is very clear, and to be frank, people see Bitcoin in different ways, as it pleases them just as you have said, but the real purpose of Bitcoin is to transact with it, and by so doing, it is circulating very fast and also increasing the value and adoption rate, which was the real goal for which satoshi invented it. Imagine if Satoshi had not done an airdrop to the early adopters, Bitcoin would not have gotten to this point, it is now, but Satoshi made sure it circulated far and wide for even distribution across the globe. It is not all about just keeping it at a particular place where it would not be seen, but rather to be able to separate a little portion that one can use for transacting, and also leave the remaining for savings, just as you have said, and by so doing, the ecosystem would keep growing as expected.