Easier said than done means the plan sounds simple but will be hard in practice. That is easier said than done.
It is a mild objection rather than a refusal, and it usually answers advice. Saying it concedes the plan is right while doubting it can be carried out.
1phraseeasier said than doneThe plan sounds simple but will be hard in practice.
“Just talk to him is easier said than done.”
easier said than done is a phrase.
Practised in Small Talk & Everyday Phrases