Indeed, and there are a number of tech companies who have fought back against those things (I can think of notable examples where Apple and Google have pushed back against LE/government pressure/attack), and the ubiquity of suing the government to not disclose information compelled by an NSL suggests they aren't the only ones.
That's not to say that that's a perfect situation, but (if your threat model is the government) a government which has to take data from unwilling companies is weaker than one that need not do so, because they have the capability to collect the data themselves.
Is it? I don't think it would be. In fact, extortion and coercion are fairly easy because there are no rules (this I can attest to from both sides of the equation). The easiest weakness to exploit is always going to be the humans involved, especially in a legitimate business. The only true way to protect data like this is to have it not exist in the first place. Once the data is created - forget it, you might as well assume if Big Bro really wants it, they're going to get it -- because they will, if they don't already have it. It's not a case of if, but when.
That's not to say that that's a perfect situation, but (if your threat model is the government) a government which has to take data from unwilling companies is weaker than one that need not do so, because they have the capability to collect the data themselves.