Dropping transmission power on the APs helps a lot of clients make better roaming decisions anyway. I did it for my 2.4ghz aps and see a lot less of client barely communicating with a far away access point rather than switching.
I have that problem all the time. I have Ubiquity DreM Machine and an AP. My laptop in my office needs a solid connection for video calls. I routinely picks a "fast" 5Ghz that drops packets instead of a "slow" 2.4 Ghz that is "solid"
That must be annoying. Here is another thing you could do if tweaking the AP isn't an option. I don't have a 5Ghz wireless adapter at hand, but from what I see on my 2.4Ghz one, you should be able to set 'Wireless Mode' in the adapter settings to 802.11ac (or 802.11ax if you're that fancy :) ) to force 5Ghz. I recall having an option to simply select the preferred band on some laptop adapters, too, so you can use it, if it's available, instead.
I do that on Windows, but there must be something similar on Mac/Unix, too. I think these options are basically driver-related so the OS choice ultimately shouldn't matter.
edit: ah, realized I misread the post. Thought the "I picks" was "it picks" :)
TL;DW: Reduce 2.4Ghz AP's transmission power by approx 7db, that's the 'magic' number that should 'even' the APs out.
I must say, though, never had an issue with devices picking a wrong band so far.
[0] https://youtube.com/watch?v=JRbAqie1_AM&t=2054 (timestamp included)