I generally don't get involved in warriors disk horse because I'm here for a good time and have other things to do than fight about cat books, but I've seen a couple takes (not going to hunt down screenshots or anything) recently that I feel like I need to say something about.
Thrushpelt is not a groomer just because he interacts with Bluepaw in a positive manner like one time while he's a warrior and she's not. (I checked Bluestar's Prophecy-- they have three interactions with each other before she becomes a warrior, all while she's an apprentice. The first is that he's impressed about her catching prey her first time out hunting. The second is him saying that she can't challenge the medicine cat. The third is him saying "may StarClan guide your paws" to her and Snowpaw when they go hunting together. They don't interact at all when she's a kit). If you think a mildly positive interaction between a child and an adult is equal to grooming, that's something you should probably do some thinking about.
In a similar vein, it's not "creepy" for Thrushpelt to not correct people when Bluefur lets the Clan think the kits are his because he's "in it to make people think they're mates". It's not some "doing the bare minimum" thing. It's helping out a friend of his for no benefit of his own because he's a nice guy. Again, if you think some guy doing a favor for someone he once had a crush on is somehow creepy and him trying to make a move, that's a reflection on you.
You're allowed to not like characters for "no reason", but you don't have to go out of your way to give yourself "a good reason" that's in no way supported by the narrative.