Yes, this is extremely common. The speaker says it happens all the time. Many business owners naturally focus on the desktop version because they are usually reviewing the site while working on a computer. As a result, they may spend most of their attention on how the site looks there and forget to seriously check the mobile version.
The problem is that this habit no longer matches real customer behavior. Mobile traffic now makes up more than half of all traffic, so in many ways it is actually more important for the website to work well on a phone than on a desktop. If the mobile experience is weak, then the business is failing a huge portion of its audience.
The answer also reinforces that a website is not just a display piece. It is an active business asset meant to attract visitors and convert them into customers. If the site is not optimized for the device most people are actually using, then it is not doing its job properly.
So yes, ignoring mobile is common—but it is also one of the most damaging mistakes a business owner can make.
The answer confirms that desktop-first thinking is still very common among business owners, largely because they tend to review websites from a computer rather than a phone. However, the speaker makes it clear that this approach is outdated because mobile traffic now dominates. A site that looks strong on desktop but weak on mobile is not truly effective, since it is underperforming on the platform where most users will encounter it. The deeper point is that a website should be judged by how well it functions as a conversion tool, not by how polished it appears in one isolated setting. Ignoring mobile design means neglecting a huge share of real-world customers and undermining the site’s business value.