Why is it seen that in today's times most teams are hesitant to enforce the follow on even if they are leading by 300 runs?

 

There are five reasons for this.

First
The chances of winning increase.

Second

On any pitch, playing the fourth inning is usually a difficult task in a test match and every captain avoids it.

Third

Back to back, Feilding is difficult for any teams, sometimes they have to field for more than two days. Especially, when the other team stays on the wicket. For example, if any team play 80 overs in the first inning and then play more than 100 overs or more in second, it will be difficult to field, and then come out for batting even for a minor target.

Fourth

There aren't brave captains like Vivian Richard or Steve Waugh. Most of today's captains play defensive cricket. They want a definite success, for this, they need a huge total to defend. a huge total like 450+ will bury the opponent team under the mountain of runs as there will be no chance of competition.

Fifth

Batting with a good lead is a comfort zone for any batsman, he does not feel any pressure. So he plays well to improve his batting average and record.