During my career, I built some websites which are using a simple design and even with some simple functions. People have commented why I cannot make them better. Yes, I really can. If you can give me more funding, of course I can. In the real world, everything is about time and budget. We only got limited time and resource. If we spend more resources on layout, we have to make some functions away to bring it back on budget. In some situations, even the budget is ok to spend a bit more on website layout, but we still need to fit the deliverable schedule too. In these cases, we will delivery a simpler version first and still keep to develop. Maybe, we can have second deployment later.
Moreover, as a web developer, making the websites looks good is not our sole considerations. We want to make a lot of pretty websites. However, we have to take some factors in considerations. For example, we have to consider cross browsers comparability. Nowadays, we need to make websites can work with tablet and mobile phone. Well, I can use flash to make a very interactive and fancy website, but I am 100% sure this website can be read in any tablet and mobile phone. We really have to take the comparability factor into considerations.
Lastly, that is another important factor we need to consider. This is web hosting cost. Even we make a very complex website on time, on budget, this kind of website may need to bring workload into the web host or require higher specifications of web hosting. The web hosting is an on-going cost. The website may need to last few years before the next re-development. Thus, this can be a largest part of budget. In the past, I had to build a cut-off version of website, because of the web hosting requirement.
Building a website is not just about the layout. We need to consider the WHOLE picture!!!