A local hobby shop is no different from any other business. If you can't handle the competition, you go out of business. The internet is HUGE competition... you can find anything you need, 24/7/365. The internet never closes.
I know a lot of guys look at the LHS with nostalgia, because they remember going there as a kid (including me)... and they attach some sentimental value to it, and insist that we "have to support the LHS" or the hobby will die, etc., etc.
Nonsense. I'm the consumer, it's my money I'm spending, and I will shop wherever and whenever it's convenient for me, whether that means the LHS or online. I don't see any reason to support the LHS if I can find a wider selection, or lower prices, or both, elsewhere, any more than I would "support" a supermarket that has less selection, higher prices, and fewer hours open than the supermarket down the street. Makes no sense to me.
And the final part of the "support your local hobby shop" argument... the "personalized service" part... that part I can understand, if "personalized service" is what you require. As for me, I know what I want when I shop, I don't need anyone to help me.
But that's just me...