Let's use the offside and the handball situation in the same scenario. Some are obvious and some aren't and provide examples. Firstly the blatant hand-ball, the Moussa Sissoko hand-ball in the CL final was blatant and obvious.
There was no need for a second opinion and only complete idiots said it wasn't a hand-ball. I've had it said to me that it was soft and harsh. It was in it's ****, it was blatant. Those that say otherwise know sweet **** all about the game.
Now for the less obvious and it was the VAR decided hand-ball between Man United and PSG. On first glance it appeared to be harsh. However after close examination it turns out it was the correct call. It was a blatant hand-ball. VAR came to the correct decision.
If there were no VAR, that may have been decided by guess-work. You cannot guess decisions like that, the same applies to off-sides. Unless you're 100% sure or 99.99% at least you do not give it,. VAR will ensure there is no doubts and no guess-work.
It will also put an end to this rubbish that decisions even themselves out. You will get wgat you deserve and that's all you get. It will also ensure that this crap that the bigger clubs get more favours than small clubs like Spurs and Chelsea.