As with anything, I think folks are trying to sell you tools for the "how" part. The trouble is always in the implementation. His point is very valid about poor architecture is hard to change... And I think over investment in tools/process for agile is precisely that.. When you spend more time and money filling out JIRA tickets and staring at Kanban boards and attended SCRUM of SCRUMs and hours long standups, you need to reevaluate if your process is doing more harm than good.