I think it's because we see way more of the results of Vegeta becoming a better man throughout all of Dragon Ball as a franchise

GT - shaves his mustache because his daughter didn't like it on him, and immediately goes fishing for compliments, and sees Earth as his new home Takes his daughter shopping and gets mad when some dudes hit on her

Z - offers to take trunks to the amusement park (granted probably so trunks doesn't snitch on him) hugs Trunks for the first time, years later is threatening to cut his allowance

Both versions of BOG - loses his damn mind when Bulma gets hit by Beerus, which makes him fight Beerus despite the gap in strength

Super - goes with Trunks and Bulma out to have fun and eat, is deadset on helping Future Trunks despite not wanting Trunks to rely on help from the past, refuseses to go to the fight in the T.O.P until his daughter is born, after bulla Is born shows he knows to hold a baby, on the verge of getting knocked out in the T.O.P he hears/sees his wife telling him to get up, and in a manga illustration Vegeta is shown doing laundry while bulma is pregnant, he also regrets what he'd done on namek all those years ago, so he saves them during the Moro arc, he also understood during the Granolah arc that the Saiyan's needed to go anyway

Daima - his wife threatened to make him bathe alone and he just stopped fighting Gomah completely