I just used a heat gun and put a slightly sharper angle at the end of the Trico wiper. Problem solved, lol.
I am so glad there is a forum to cover this issue, since the Mazda5 user manual skipped an important step: Taking off the plastic cover over the axle mentioned in diogenes's post. I was befuddled by my inability to raise the wiper arm without that step.
Attached below are pictures on how to remove the plastic cover. Simply pull apart slightly where the red arrows are, and the cover should come off. The rest matches the manual.
Have fun!
I love this. Simple and is an actual modification. I'll try this tonight. Thanks @Indelibility