The reality is much weirder than "the left won".
What actually happened with the actual Left (not to be confused with contemporary or historical, mainstream Democrats or Liberals):
- the Left never liked space. Google "Whitey on the Moon".
- the left made economic justice a requirement for stopping climate catastrophe, explicitly breaking with the tech solution community (see Thunberg's Time editorial).
- the left flipped on freedom of speech in the last few decades or were never into it (depending on faction).
- the left adopted the age old strategy of personalizing politics with its anti-billionaire strategy (shifting from a failed anti-corporate strategy), and that put Elon, specifically, in the crosshairs. From then on, saying anything good about Elon or his companies was forbidden since he became the Evil Supervillain who was paradoxically also incompetent and not responsible for anything his companies produced. It's not meant to make sense, it's meant to short circuit the brain and go straight to the "other fear" reflex. It's a political strategy, not an ideology.
As for helping quadriplegics, everyone seems to have bought in to redesigning our built environment around their disability rather than making them able in normal spaces. When you have that much money and regulatory weight invested in working around something, it creates a subtle pressure not to solve the underlying problem, even if everyone would benefit. (See also child seats vs the latest auto-tensioning seatbelts.)
Biden, who is definitely not a Leftist, happened to be openly and slavishly pro union, and specifically pro UAW, at exactly the worst possible time for decarbonizing transportation. Biden has stated he owes his political career to the UAW. Other than Bernie, who is ideologically pro union, no other Democrat, including Harris, would have been as bad on this issue wrt Elon and his companies. But the days of union members voting for pro union politicians are mostly over, thanks in part to Trump and MAGA being so popular among the fundamentally conservative ranks of major industrial unions like UAW. It's likely that left of center politicians will realize that over the next few election cycles. But that specific damage is done, and not by the left. It was done by pure political patronage that exists in every political faction.