They can get great people but then choose to spend their effort solely on features and ignoring things like size and speed - for example, the GTA V loading time

They can get great people but then choose to spend their effort solely on features and ignoring things like size and speed - for example, the GTA V loading time issue (https://nee.lv/2021/02/28/How-I-cut-GTA-Online-loading-times-by-70/ https://nee.lv/2021/02/28/How-I-cut-GTA-Online-loading-times...) is a good example, where GTA V did many things really well technically but then completely ignored a huge loading performance issue for many years; things like that aren't "very much a skill/experience thing", the difference is whether the company cares.