If you leave out the hyperparameters, we try to figure out the best parameters for your type of job. We picked a versatile set of parameters which is very resilient across a large number of cases.
Increasing the dataset size will make a much bigger difference, than tinkering with the hyperparameters. My advice would be to leave the epochs at 4, unless you have a very small dataset.
The reason we left the hyperparameters in there are in case you have a very strong reason to change them, or if you’re doing academic research where you’re trying to test a particular hypothesis.