If you are protecting your technology and your first thought isn't your mobile device then you are not going to make it. In my opinion mobile security is always my first priority.
What you use most should be the most important of all things you have to protect, for most, that is your phone. The technology you carry around with you on a day to day schedule has far more data worth something to a threat. Where ordinary people spend time more on their phone than they do a computer, a phone is the golden ticket to your life. Even if you have nothing of value to worry on compromise now, it doesn't mean that will not have something valuable later after further use.
Where a computer manages day to day work tasks, a phone often manages people's lives. They are an irreplaceable tool in society. Your communications, photos, videos, documents, online activity or possibly even your finances and identity are managed on portable devices.
The most promenant attack campaigns we know from world affairs involve targeting smartphones, some of the most expensive bounties for zero-days involve mobile software, and there are multiple industries whose main objectives are to find and attack smartphones. Threat actors love smartphones.
Protect what is most valuable.