Your argument is full of holes, and here’s only the most recent of glaring examples:
If RINOs “feared their voters,” then one of the various Obamacare Repeal bills would be signed into law by now.
That one is easy — all the R’s voted for ObamaCare repeal except for three. Two defections were usual suspect RINOs who regularly vote with dems. The 3rd defection (McCain) was likely due to Trump personally pissing him off with his stupid statement during the primaries. Trump failed to cut a deal with the 3 RINOs and get them on board.
The last one got stopped by a guy who will probably die before he has to face the voters again...a guy who has always hated Trump ever since Trump questioned his "heroism".
McCain is a douche-bag who put his petty pride before the needs of his country.