Note that people have to compromise in FPTP, too, the difference is that in a multiparty system compromises across the middle after an election are more normal,

Note that people have to compromise in FPTP, too, the difference is that in a multiparty system compromises across the middle after an election are more normal, in FPTP, compromises within each of two sides, each seeking to carve out an electoral plurality and dependent on the most committed forces on their “side” of the middle, are functionally necessary. (Also, on FPTP, alienating a voter from the opposing coalition from voting entirely is half as good as winning a vote, whereas alienating voters is much less effective in a multiparty system.)