No. Not all situations where the ball is off the field are equal.
The ball going out for a throw-in, corner or goal kick (within reason) are not stoppages in play per se. But injuries, substitutions, goals, or VAR decisions are actual stoppages, so should be treated as such IMO. If that means having an official time-keeper who stops the clock and playing 50+ mins per half then fine by me (I don't leave early), but they will never reduce the halves to 30 odd minutes or whatever and then insist on the clock stopping whenever the ball goes out. Never.