The phrase "inherent weaknesses" refers to the natural flaws or limitations that something or someone has. It means that these weaknesses are built into their nature and cannot be easily changed or removed. Full definition
We reached this conclusion partly by eliminating other possible causes, but also by identifying inherent weaknesses in sampling and weighting procedures. (politics.co.uk)
Air ride systems have one inherent weakness no matter which manufacturer has created them. (yourmechanic.com)
It would be nice if you stopped assuming I believe that renewables are entirely free of problems and do not have various inherent weaknesses. (reneweconomy.com.au)