There are no absolute answers.
It all depends on who you are and what are the implications.
A team like Afghanistan when set a target of 350 can decide to settle for 250 and will be applauded for a respectable total. They are the newcomers to the world of cricket. Same thing applies to Bermuda etc.
It applied to Bangladesh 4-5 years back, but not anymore. With an exception.
If team is playing a group match where NRR is eventually going to come into play and determine who qualifies, it becomes an added responsibility to decide at some point to give up the chase and settle for an achievable score. Not in the best spirits of the game, but wise nonetheless.
Ashraful for knighthood.
Baba Tomar Bangladeshe Koto Kola Chao
Kola Bagan Chash Koira Kosto Koira Khao Baba Re