If we’re buddies? No issues, whatever. If it’s a pick up game or especially in a tournament setting? I’m not comfortable with this, I’ve seen too many people try to fudge physical dice, how do I know you haven’t slightly weighted your rolls to give an advantage?

Edit: typing is apparently challenging

You answered your own question: "my friends are fine with me playing like that."

Your friends are the only people who matter in this equation. Why do you give a shit about the opinions of a bunch of strangers?

Can you roll like this in a tournament? Absolutely not, but you probably knew that already. Can you roll like this in a friendly store game? Up to your opponent. Again, that's the only person in the equation who matters. There's no Association of Proper Warhammer Play who are going to kick down your door and tell you that you're playing with plastic army men wrong.

Rolling physical dice is half the fun, but you do you I guess.

I'd say it depends on what you have to roll, if you only have 5 dice and need to roll 100 times it's a lot different than 20 dice and rolling 40 times. I recommend slowly getting more dice either way.