“Doorways are sites or pages created to rank highly for specific search queries. They are bad for users because they can lead to multiple similar pages in user search results, where each result ends up taking the user to essentially the same destination. They can also lead users to intermediate pages that are not as useful as the final destination.

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Well elaborated Juan! In my 6 year of experience of SEO client handling, I faced same concerns. At the end clients don't care what activities we do, how many back-links we generated, ect. They only focus, how many leads generated through our efforts and I feel, this mentality will kill SEO profession one day. Clients need to understand the SEO first and then hire someone.
First, let's discuss why you even need a webpage in this day of social media domination of the web. On a personal level, you wouldn't want to send prospective employers to your Facebook page, so a personal website makes more sense as an online, customized resume. Another reason worth consideration, for both personal and business sites, is that building your own site gives you endless design choices. You also have total control over products and services you may sell and how they're delivered.