Could "figure out a way"?
"I've planned this for years, designed this flaw, had it built under extreme risk, created a file with the data for the Rebellion, and sent a transmission to the Rebels to tell them all of this BUT I'm going to "bank" on the Rebels "figuring out a way" to get explosives into the reactor by sending them 1 mega-trillion GB of RAW DATA instead of a simple 'small ship/exhaust port/proton torpedo' explanation that even a five-year-old could grasp." Genius award for Galen!
Look at the schematic CLEARLY SHOWN in ANH - how that exhaust port leads directly, no I mean DIRECTLY.... all... that.... LONG... way... down to the reactor. You're saying Erso's a genius engineer who knows the DS like the back of his hand (and the Rebels know nothing and have no engineering skills in terms of the DS,) and there's a exhaust port that leads a thousand miles DIRECTLY to the fatal flaw he's designed and built... and yet instead, he's going send them a mega-trillion GB of raw data and "bank" on the Rebels "figuring" it out?
When he could have simply said (in the hologram no less...) - "exhaust port sends proton torpedo directly to reactor... boom." No need for the Rebels to dig through a million GB of plumbing layouts of the Death Star, right?
In ANH originally, the Rebels' need to dig through the raw data of the complete DS plans was necessary - they didn't have anyone on the inside and had to actually FIGURE OUT a weakness in its defenses themselves. But RO"s retcon (man on the inside, designed flaw, sending word out to Rebels) changes all of that... and fan enabling aside, it honestly makes little sense now, just like Leia and Vader's now non-sensical dialog in the opening of ANH.
Honestly, they didn't need sweaty unshaven shoot-in-the-back guys to pull this off - the fan enabling could levitate a proton torpedo across the galaxy and into that reactor core.
I just saw RO again last night and next I'm taking a look at Saw Gerrera... the diehard militant "extremist" who stages a massive insurgent attack in Jedda City on the same day his men capture an Imperial defector carrying stunning revelations for the Rebellion (existence of DS, ability to destroy it.) A big day for an anti-imperial zealot/militant right? BUT no........ Saw suddenly, on that same day, inexplicably decides he's "tired of running" and commits suicide-by-Death-Star-blast.
And that has NOTHING to do with the fact that he's the ONLY person who can corroborate Galen's hologram transmission, proving Jyn is telling the truth.