Keep in mind, the same reason that floating ability score improvements were added to Tashas, is the same reason that racist fixed ability scores cannot be the default rule.
And yet they still are, and I don't think that there is any plan to change this.
Moreover, why this focus on ability scores, when the description of some races stay the same, how can this be more unflattering than not having a bonus to Cha: "Half-Orc: Half-orcs’ grayish pigmentation, sloping foreheads, jutting jaws, prominent teeth, and towering builds make their orcish heritage plain for all to see... Half-orcs are not evil by nature, but evil does lurk within them, whether they embrace it or rebel against it."
Please note that I'm not saying that I support any sort of racism, but that Floating ASIs are at best the tip of the iceberg here, and that this focus on stats is actually for me fighting the wrong fight, and in fact distracting from the real fight, which should probably not be fought on fantasy battlegrounds, and in any case not through that purely technical mean which I find misguided.
The whole point is to eliminate reallife racist tropes from the D&D tradition. Whose Intelligence is assumed to be higher or lower is part of the undesirable racist tropes.
Even if I agreed with you (which I in general do not for a lot of reasons that have nothing to do in particular with Floating ASIs, which is why I will leave them out of here), I would like to point out that changing initial stats on PCs will change absolutely nothing on the fantasy races of D&D, because the races are not defined by the characters.
The MM and other sources (all the supplements, all the modules) will still contain the standard stats and description of the fantasy races which are absolutely not equal to each other (thankfully, because it would just kill the genre if all creatures in the world had to have the same average stats), with some being extremely intelligent, others being extremely dumbs, and a lot of them being really ugly.
So it will have exactly zero effect on any fantasy racism that the fantasy races would have towards each other in the setting. Even if the PCs have exceptional stats, these are not displayed on their forehead, and they would therefore be treated as their entire race or (possibly even worse) as freaks amongst their race, both by their race and other races.
So while I totally support all fights against racism in the real world, not only is the translation of this to fantasy worlds highly debatable (again, not a topic for here) and debated, but claiming that the floating ASIs would have any effect on the way fantasy racism would be treated in the game is for me not a receivable argument in favour of the Floating ASIs.