Did my time (16 years) as a reservist, been out for a couple of years now.
During that time, my former unit was mobilised, in whole or part, 4 times - the last 3 of those coming in a 4 year approx timeframe (Balkans, Afghanistan, GW2). Rumour has it that the brown envelopes will be in the mail again next year as the UK takes the lead in Afghanistan.
Even the most dedicated of Reservists could find it hard to hold down a civilian job/career, family/home life in the face of that level of activity.
No surprise at all to me to hear this. At the end of the day, a reservists first priority has to be to the job that pays the mortgage.