That's absolutely right. In theory, the RTP of a slot machine is fixed and doesn't change. However, sometimes the game shows a high RTP for a day or a week, which encourages players to play with a higher chance of winning.
As for me, just like you, I don't really think too much about it, because honestly, I've tried playing games with high daily RTP several times, but I only won big once, so I think it all comes down to luck at that moment
It's that we all love to go to a Slot with a very high RTP , because that draws attention to how easily we can win, anyone would do it, and it is one of the Parameters that stand out the most in all this, I am not a fan of slots, but when I see that there is that high Number I play, it does not matter if I lose because I try, and by trying I open the doors to being able to win , everything is in the possibilities.