I can't speak for medical ethics in Poland ace, but if that was the case in the UK, there would be a serious case to answer to. The whole concept of male breast issues is relatively new and by far, much less widespread than say general liposuction on other body parts, usually on females or breast augmentation/mastectomy/reduction.
Even today in the UK (where I believe there is probably the highest standards of medical ethics) there is not much consensus over what is a standard or general protocol for male chest reduction procedures. My surgeon goes with the school of thought that everything that can be done in one surgery should be done. And the fact there is no charge for revision, there is no incentive to only carry out part of a procedure.
If it was suspected that private surgeons were only carrying out some of the work in the hope that the patient would need to return and pay for further work, then they'd find themselves in front of the ethics committee faster than you can say 'I need revision'!
I cannot comment on what goes on in Poland, but it's my guess that this clinic specialises in lipo only procedures and whilst the surgeon is capable of also doing excision, it is probably not what he is used to and probably thinks (in his experience) is not indicated to form a natural male chest contour. This is very subjective. This surgeon is not wrong, it's his style or method of practice. However, we very often see less than satisfactory results on guys on this forum that have had lipo only when there has been significant glandular tissue present and have gone back for revision.
Treatment of gynaecomastia is probably one of the fastest growing corrective/cosmetic treatments in the UK at the moment. Currently there are few experienced surgeons in this procedure and there is certainly no general consensus on 'good practice.' I'd say it's going to be another five years or so before we see treatment of gynaecomastia being practiced as routinely as other treatments whereby surgeons practice in a more uniformed manor.
Until then, we continue to be the guinea pigs allowing our current surgeons to further improve their techniques for the next generation of guys seeking out this kind of surgery.
Until such times, more than ever, do your homework. Make sure you agree what your surgeon intends to do with you well in advance. Agree the full price in advance and agree what happens if expectations are not met and further work is needed.