I guess that there's a divided opinion between therians on wearing gear, and if it's really necessary! But I feel that some therians have a bit onesided view when it comes to wearing gear. Because they them selves don't find any need to wear gear and because it does not make much sense to them, some might see it as a bit silly! Wearing your gear though is not silly, or makes you a poser or a fake therian, that's simply not true! I understand the worry that people forget about the spiritual and focus too much on material stuff, forgetting what really matters. But not all therians see them selves as spiritual therians. Some of us are also people who identify as human beings as well as we identify as our animal selves!
Yes I'm a therian, but I'm also human so I'll wear my spirithood, ears and tail if I wish! Human's since the beginning have had a fascination with animals and shared strong bonds with them. It's normal for our human sides to even want to wear things with animal features on such as ears, paws and tails. Or clothes with animal print on. Furries for example is an example of that. That's just part of who many people are.
I think that most therians understand that accessories is not what makes one a therian, but how we feel, identify and see our selves on the inside! As long as we understand that, then I don't see what's so wrong about wearing therian gear?!
Although gear alone does not make one a therian, it still becomes a part of many therian's identity. Some of us feel better when we can match how we feel on the inside through what we wear. It's like letting out some of our inner selves