Scalping has the smallest profits a trader could get compare to swing trades and day trades, so using the term "practical" is not suited for it, "safest" I think suits it the most. Even with the small profits in scalping, losses on it is only minimal compare to the two other trading ways that I've mentioned, in short, we can call scalping the "safe zone" in Trading, in my opinion.
No matter how small it is, if you add all of your profits, it could still be bigger, not that big but better than having no profits at all.
I beg to differ. Scalping is opposite to what you have mentioned "Safe zone", it is considered as one of the most risky type of trading in any assets. Since you have small profits per trade, a single lost trade could make a substantial loss to your capital. Even using a 1:1.5 Risk/Reward ratio is not suitable for this type of trading since you are aiming for a small profit in a short price change, for this reason, a 3:1 RR ratio is effective.