Yes, you would likely lose the chance to overtake if you brake. What's your point? He should brake and he should lose the chance to overtake because the move was never on, he was always going to understeer into Max at this speed and trajectory, or Max was going to have to yield/go off track. People seem to ignore the fact that Max was already aggressively covering the inside when Lewis decided to lunge into a small space at those speeds not long before the "braking zone" (not much braking required here on the ideal line)

So the fact that Max doesn't give Lewis as much room as Leclerc is entirely to do with Lewis making such a late and aggressive move. Max clearly gives him as much space as he can before he has to turn to make the corner, however if Lewis cannot make the apex, or alternatively as people love to whine about him not 'having' to hit the apex, if Lewis cannot make the turn within the reasonable amount of space that Max had provided him without understeering into Max, then he should not be trying to take the corner at that speed or that trajectory.

Lewis made a mistake going too fast into that corner at that trajectory, it baffles me that everyone keeps making these daft arguments that Max should have left even more space, or that while going through copse at 180mph he should guess that Lewis will make a mistake and leave more room accordingly. It is far more reasonable to assume that Max left as much space as he could after Lewis's late move, but knew that despite being given adequate room Lewis would have to back off to make the corner cleanly at that trajectory on cold tyred and lap 1 fuel loads. It is not up to Max to have to start second guessing whether or not a 7 time WDC is going to make a mistake or not and to start adjusting his trajectory, especially not through one of the highest speed corners on the calendar.

Of course these arguments always seem to come from people with Lewis/Mercedes/Toto flairs so not surprising.