I've noticed late zoomers are extremely fucking weird about any sort of age gap, and these people certainly talk like late zoomers. They'll hear that Sally McFuckFace, age 25 is dating Donnie McDingleBerry, age 31 and they'll act like it's the same as a 24 year old man dating a 15 year old or some shit. It's quite strange, especially considering most of that generation is terminally pornsick and is most assuredly not puritan in many other ways. Someone who's 23 dating a 19 year old? You sick fuck, you're a fucking pedophile bro.
Also I'm pretty sure it's never really outright stated how old Lucky is in the show, and in any case both parties are adults, so who gives a shit? Part of the pitch for Lucky was probably "we want Tom Petty to voice a character and he's down to do it" so it was done, it doesn't necessarily mean the character is implied to be Tom Petty's actual age. It's like some form of turbo-feminist shit that ironically makes it seem as if fully grown, adult women have no agency of their own and infantilizes them to an extent, necessitating that society "call out" some 30 year old dude dating a woman who's 24, like she needs to be protected from herself, as if she can't make her own decisions.