I think the OP would be much better if it were rephrased with probabilistic timelines, even if they were clearly wrong/overconfident.

A human who has the motivation to extend his life, a proper understanding of how to achieve it and the necessary skills to realize his plans, should be considered as almost a superman.

This could be deciphered to mean "there is a 95% chance that an average motivated individual of age 25 today will ride the life extension bandwagon to live to be >1000 years old".

Which IMO is incorrect, but I like it much more now that it's making itself maximally vulnerable to criticism.