So to answer should we give tochacha?
Yes if:
1) you are giving out of a sense of caring for the other, NOT to shtech someone out
2) the person is on your spiritual level- amisecha
3) it is likely to be effective
You have to be careful with all the above because as the posuk hocheiach tochiach ends off- vlo sisa alav chet.
If your are certain of the above go right ahead.
If not, bring them closer by speaking in a positive uplifting manner and you’re likely to get a good result with no risks involved