why didn't sans help frisk (or the player) at the true pacifist route
some days ago i got into Undertale again and I was seeing the sans fight again and I was thinking (I think someone may already said this but i don't care) when you're in the end of the true pacifist route all the monsters you met during the game come to met you at barrier (I think it was the barrier i Haven't rewatch the true pacifist route im just saying what I remember) and then you find out that flowey was behind that and then he traps the monster and among the monsters there's sans and from his fight we can see that he's very strong so..... WHY DIDN'T HE HELP FRISK?!? we know that in the form flowey was before he absorbed the souls he could still beat him so why didn't he help frisk?
to answer that I have two theories one is funny and the other is more serious
number one (serious one): is that sans fully believed in you at that point he believed that you were a good person and could beat asriel and so he let you do it alone (but in my opinion that was a risky move because the player could just give up and use the reset button or just close the game)
second one (funny one): sans was just lazy as usual and was like "im not in the mood to do this so yeah it's up to then this time" and just let you handle things while he was pretended to not be able to do anything because he was lazy to fight
so yeah that's all I had to say and bye! (sorry if I wrote something wrong English isn't my first language (• ▽ •;) )