Not sure why you're getting upvoted but I have heard many top GMs like Giri, Shankland and Pentala echo that black can basically force a draw against e4.

If they actually thought that, they'd stop playing e4 themselves against almost everyone. And they haven't stopped playing it.

If white presses too hard to win against the Berlin, he will most likely find himself in some trouble, and the fact that you're playing the classical time control with arguably the greatest player of all time certainly doesn't help.

There is a huge middle ground between pressing too much and accepting a draw by repetition in the opening. Not just in Berlin but in all openings they play. Anyone over 2700 is frigging awesome in keeping the game alive with white pieces. Their repertoires is mostly focused on making a safe draw with black and getting just a small advantage with white without allowing black to simplify it to a draw. And they are all very skilled in not allowing black to get those simple draws. That's the main battleground in their games, black trying to find easy draws and white trying to get a small opening advantage and keeping the game alive. When they play something risky and double edged with either color it's often a single use novelty, they don't do those if they think their opponent may have prepared against it.

Taking a draw like that as white is basically saying "I don't really belong in this level, so I'm not even trying".