But all choices made in D&D are for power. All those nifty abilities we get from races, classes, feats, weapons, treasure, etc. are to be awesome adventurers.
I made a halfling alchemist (from EN world's Masterclass Codex) and the floating ASI let me put +2 in Int and a +1 in Cha. She's a travelling healer and I really wanted her to be smart, with a good bedside manner. I don't think putting my highest score in Int was for "power gaming." There is absolutely no reason that my halfling should not start just as bright as a gnome. And working harder to catch up makes no sense.
I also used the "create your own race" to make a brownie. +2 Wis, +1 Dex and the Chef feat. I have him all figured out except his class.
Power gaming is squeezing every last advantage you can get out of the system to create as powerful build as possible, ignoring all story reasons. With Tasha's, I'm seeing players excited at having a little more room to get creative.