I agree it's particularly dumb thing to complain about. You can land on Pluto. Well for posterity, I'm assuming they mean going to the planet and landing directly, which you can't do to any planet. You can land on Pluto, just not by flying directly to it. You can't really fly to any planet and land on it like that because when you're at the planet, selecting it has you bring up the planetary map to initiate landing/destinations.
Basically, if I'm anywhere in the galaxy I can select Pluto, plot a course, and land in it's orbit. Or, if I've landed on it before and visited a settlement, or made my own outpost, then I can select either of those.
You cannot fly from earth to Mars and then directly land on Mars. You can select a location near mars and then press a button to travel to it, likewise for any waypoints you can see.
At no point does the game or the marketing say that you can fly to planets without menus and land on the planet with a seamless transition, so I don't really understand what everyone is up in arms about. They told us long ago that cutscenes would be the transitions so frankly I'm just seeing people complain for making assumptions they were never promised. (unlike 2077 which actually did have some missed promises).
So yeah, "can't land" on Pluto without using the map menu... Just like literally everything else except waypoints in the game