There was already one study that determined the pfizer vaccine does not effect male fertility. COVID has been proven to effect testicles and sperm, so if you want to get immunity the old fashioned way, you might want to put a little in the bank, just in case...
https://www.medrxiv.org/content/10.1101/2021.04.30.21255690v1
An extract from your linked study:
“…Previous studies demonstrate that SARS-CoV-2 infection may impair sperm parameters. In this study, we are the first to assess the effect of the BNT162b2 mRNA Covid-19 vaccine on sperm parameters. Our results demonstrate that the vaccine does not impair sperm parameters. Thus, we recommend that couples desiring to conceive should vaccinate, as vaccination does not affect sperm whereas SARS-CoV-2 infection does impair sperm….”