Often, artists have little say in how their recordings are licensed. Audiophile releases are a tiny chunk of the market and 45s are more expensive to cut, press and manufacture, along with additional expenses in packaging and shipping.
Steve Hoffman has said that the only real difference is that 45 LPs are louder.
A good 33 is fine by me-- since my baseline is standard issue stuff. And 45 LPs are a PITA. Maybe this is about sonic spectacularity, but I'm not gonna buy some warhorse I probably already own simply b/c it was reissued as a 45 or on some new vinyl formulation. Indeed the last batch of MM stuff that Kevin Gray did went back to 33.
Buy what you like. I'm not trying to persuade you otherwise. Just my take as somebody who has been around the block a few times (too many).