A motion can only be ruled out of order if it conflicts with strata law, or your by-laws or would be illegal or unenforceable. To ask for a motion to be considered at a general meeting, anyone who is able to vote at that meeting should provide the secretary of the committee (usually via the strata manager) the content of the motion in writing, identifying themselves, and adding an explanatory note of up to 300 words.
Either they failed to provide any explanatory note, or the secretary added their own note, (which is probably not ideal, but at least they identified this themselves.)
I’m guessing that the chair or secretary is indicating the motion will be ruled out of order because it is “unenforceable”? The example motion you provided is not well worded. There is not enough detail and is too vague, and so if the motion, in its current form, were approved, then the OC would not be able to carry it out. That motion needs more details – who is to organise the meeting, where and when is it to be held, what will be on the agenda, and who will cover the costs of the meeting? A better example would be “The OC will instruct and pay for the strata manager to organise a meeting to discuss the planned remedial works on the first Monday of the month, every 4 months, beginning in June, to be held at their premises, and broadcast via Zoom, from 4 pm, to last at most 1 hour. All owners and residents will be invited, and reminded about the meeting a week, and a day in advance, and the secretary, or another member, of the strata committee will be tasked to provide a 10 minute update on the progress of the works. Additional discussion points will be solicited a week in advance, and the agenda will be notified to all invitees at least 3 days beforehand. The strata manager will provide an estimate of the cost of this arrangement, which is likely to be $600 per meeting.”
That’s a quick attempt at a valid motion – the actual way of carrying out the task, and its cost, will need to be specified, in order that owners can make a decision about it. Meetings don’t organise themselves, and the organisers may not want to devote the time – it is not valid for owners to speculate that other people will want to do this, and also someone, which will probably be the owners, will need to fund all this.
However, at the general meeting, it is possible to amend the motion, and so if the proposer involved wants to do so, then they can provide a valid and better worded motion as an amendment, which will be able to be voted on. The strata manager will be happy to help draft a valid motion, I suspect, but the proposer of the motion will probably have the best chance of getting it agreed to, if they do a lot of the work, and minimise the costs involved, by doing the legwork themselves.