That aspect of things is puzzling.
If abortion is so popular, then Democrats would be eager to pass abortion laws in all.of the states. They would be eager to go through the Democratic process to pass their laws.
If it were really so popular, they could pass a constitutional amendment and tell the Supreme Court to stuff it.
The truth is, 75% only support it when they use push poll tricks to word the question so that 75% of people will agree. Change the wording slightly to say “would you support returning the question of abortion to the state legislatures?” and 75% of the people will say “yes” to that instead.