That’s because sports especially pro sports involves Tons of money, they all do whatever it takes to win, each and every team, owners, players, coaches, from high school, to college, etc
If you ever played collegiate or been around top athletes, you would know
I have.
And regardless of all that, all NFL teams didn't hire a person whose specific job was to steal signs, decipher codes, etc, or have an elaborate method of disguise to film and steal other teams information.
But of course teams will push the envelope to win, that's a no brainer. But the point is, what Pats and Astros did, was way beyond that.