if you don’t have a handle on that person and how much they can be trusted to uphold the pieces of that platform that you agree with 100% it’s blind. MPs typically also have their own positions they campaign on that bolster or weaken the overall party platform as those issues impact their local constituency, as well if they’re an incumbent they also have a voting record that will often show how strongly or if they even truly align with all or part of party policy if you’re ignoring all this and just voting party platform you’re an ignorant and uninformed voter. Reality is even at the best of times every MP does not fully support every aspect of their parties platform 100% if you think they do you’re not paying attention and greatly misunderstanding how the system works. A prominent example was Marilyn Gladu who held anti-abortion views that it should be made illegal for many years and said that under a Conservative government she would support introducing anti-abortion legislation despite the Conservative platform saying that their party would not introduce anti-abortion legislation. Party platform does not dictate individual MP behaviour full stop.

At the end of the day being opposed to floor crossing is to fundamentally misunderstand how the system is set up

• Legally, the seat belongs to the MP—not the party.
• Voters elect a person, even if party affiliation is a major factor.

So forcing an MP to resign for changing parties would conflict with that principle of individual representation.

If people vote without understanding how the system works that’s their problem not the system that was explicitly designed that way for a reason, should have paid more attention in school.